consulate in benghazi, libya, where four americans died, evidence the u.s. continues to be vulnerable to terrorist attacks. >> they were killed in the course of a terrorist attack. >> much else is unanswered or under dispute. was al qaeda involved? >> we are looking at indications that individuals in the attack may have had connections to al qaeda. >> was the attack planneded like libya insists or spontaneous as officials believe. >> i just don't think that people come to protest equipped with rpgs and other heavy weapons. >> we are conducting interviews. gathering evidence. trying to sort out the facts. >> as investigators sort out the facts. the families are laying their loved ones to rest. today a funeral procession in massachusetts for one of the former navy seals. scenes of sadness. susan collins says could have been prevented had the consulate been better protected. she asked why the u.s. relied on limited number of lbi ialibyan instead mau instead of marines. >> i'm stunned and appalled. >> secure one of the factors under evaluation as the u.s. tries